git.pond.sub.org Git - empserver/blob - src/lib/commands/navi.c

   1 /*
   2  *  Empire - A multi-player, client/server Internet based war game.
   3  *  Copyright (C) 1986-2007, Dave Pare, Jeff Bailey, Thomas Ruschak,
   4  *                           Ken Stevens, Steve McClure
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ---
  21  *
  22  *  See files README, COPYING and CREDITS in the root of the source
  23  *  tree for related information and legal notices.  It is expected
  24  *  that future projects/authors will amend these files as needed.
  25  *
  26  *  ---
  27  *
  28  *  navi.c: Navigate ships and such
  29  *
  30  *  Known contributors to this file:
  31  *     Ken Stevens, 1995 (rewritten)
  32  *     Ron Koenderink, 2006-2007
  33  */
  34
  35 #include <config.h>
  36
  37 #include <ctype.h>
  38 #include "commands.h"
  39 #include "map.h"
  40 #include "optlist.h"
  41 #include "path.h"
  42 #include "empobj.h"
  43 #include "unit.h"
  44
  45 static void pr_leader_change(struct empobj *leader);
  46 static struct empobj *get_leader(struct emp_qelem *list);
  47 static void switch_leader(struct emp_qelem *list, int uid);
  48
  49 int
  50 navi(void)
  51 {
  52     struct nstr_item ni_ship;
  53     struct emp_qelem ship_list;
  54     double minmob, maxmob;
  55     int together;
  56
  57     if (!snxtitem(&ni_ship, EF_SHIP, player->argp[1]))
  58         return RET_SYN;
  59     shp_sel(&ni_ship, &ship_list);
  60     shp_nav(&ship_list, &minmob, &maxmob, &together, player->cnum);
  61     if (QEMPTY(&ship_list)) {
  62         pr("No ships\n");
  63         return RET_FAIL;
  64     }
  65
  66     return do_unit_move(&ship_list, &together, &minmob, &maxmob);
  67 }
  68
  69 int
  70 do_unit_move(struct emp_qelem *ulist, int *together,
  71              double *minmob, double *maxmob)
  72 {
  73     char *cp = NULL;
  74     int leader_uid;
  75     struct empobj *leader;
  76     int dir;
  77     int stopping = 0;
  78     int skip = 0;
  79     char buf[1024];
  80     char prompt[128];
  81     char scanspace[1024];
  82     char pathtaken[1024];  /* Doubtful we'll have a path longer than this */
  83     char *pt = pathtaken;
  84     char bmap_flag;
  85     int ac;
  86     short type;
  87
  88     leader = get_leader(ulist);
  89     leader_uid = leader->uid;
  90     type = leader->ef_type;
  91     pr("%s is %s\n",
  92         type == EF_SHIP ? "Flagship" : "Leader",
  93         obj_nameof(leader));
  94
  95     if (player->argp[2]) {
  96         strcpy(buf, player->argp[2]);
  97         if (type == EF_SHIP) {
  98             if (!(cp = shp_path(*together, (struct shpstr *)leader, buf)))
  99                 cp = player->argp[2];
 100         } else {
 101             if (!(cp = lnd_path(*together, (struct lndstr *)leader, buf)))
 102                 cp = player->argp[2];
 103         }
 104     }
 105
 106     *pt = '\0';
 107     while (!QEMPTY(ulist)) {
 108         char dp[80];
 109
 110         if (cp == NULL || *cp == '\0' || stopping) {
 111             stopping = 0;
 112             if (type == EF_SHIP)
 113                 shp_nav(ulist, minmob, maxmob, together, player->cnum);
 114             else
 115                 lnd_mar(ulist, minmob, maxmob, together, player->cnum);
 116             if (QEMPTY(ulist)) {
 117                 pr("No %s left\n",
 118                     type == EF_SHIP ? "ships" : "lands");
 119                 if (type == EF_SHIP && strlen(pathtaken) > 1) {
 120                     pathtaken[strlen(pathtaken) - 1] = '\0';
 121                     pr("Path taken: %s\n", pathtaken);
 122                 }
 123                 return RET_OK;
 124             }
 125             leader = get_leader(ulist);
 126             if (leader->uid != leader_uid) {
 127                 leader_uid = leader->uid;
 128                 pr_leader_change(leader);
 129                 stopping = 1;
 130                 continue;
 131             }
 132             if (!skip)
 133                 nav_map(leader->x, leader->y,
 134                         type == EF_SHIP ?
 135                             !(mchr[(int)leader->type].m_flags & M_SUB) : 1);
 136             else
 137                 skip = 0;
 138             sprintf(prompt, "<%.1f:%.1f: %s> ", *maxmob,
 139                     *minmob, xyas(leader->x, leader->y, player->cnum));
 140             cp = getstring(prompt, buf);
 141             /* Just in case any of our units were shelled while we were
 142              * at the prompt, we call shp_nav() or lnd_mar() again.
 143              */
 144             if (type == EF_SHIP)
 145                 shp_nav(ulist, minmob, maxmob, together, player->cnum);
 146             else
 147                 lnd_mar(ulist, minmob, maxmob, together, player->cnum);
 148             if (QEMPTY(ulist)) {
 149                 pr("No %s left\n",
 150                     type == EF_SHIP ? "ships" : "lands");
 151                 if (type == EF_SHIP && strlen(pathtaken) > 1) {
 152                     pathtaken[strlen(pathtaken) - 1] = '\0';
 153                     pr("Path taken: %s\n", pathtaken);
 154                 }
 155                 return RET_OK;
 156             }
 157             leader = get_leader(ulist);
 158             if (leader->uid != leader_uid) {
 159                 leader_uid = leader->uid;
 160                 pr_leader_change(leader);
 161                 stopping = 1;
 162                 continue;
 163             }
 164             if (type == EF_SHIP) {
 165                 if (!(cp = shp_path(*together, (struct shpstr *)leader,
 166                                     buf)))
 167                     cp = buf;
 168             } else {
 169                 if (!(cp = lnd_path(*together, (struct lndstr *)leader,
 170                                     buf)))
 171                     cp = buf;
 172             }
 173         }
 174         if (type == EF_SHIP) {
 175             radmapnopr(leader->x, leader->y, (int)leader->effic,
 176                        (int)techfact(leader->tech,
 177                                      mchr[(int)leader->type].m_vrnge),
 178                        (mchr[(int)leader->type].m_flags & M_SONAR)
 179                        ? techfact(leader->tech, 1.0) : 0.0);
 180         }
 181         if (cp == NULL || *cp == '\0')
 182             cp = &dirch[DIR_STOP];
 183         dir = chkdir(*cp, DIR_STOP, DIR_LAST);
 184         if (dir >= 0) {
 185             if (type == EF_SHIP) {
 186                 stopping |= shp_nav_one_sector(ulist, dir,
 187                     player->cnum, *together);
 188                 if (stopping != 2) {
 189                     *pt++ = dirch[dir];
 190                     *pt = '\0';
 191                 }
 192             } else
 193                 stopping |=
 194                     lnd_mar_one_sector(ulist, dir, player->cnum,
 195                         *together);
 196             cp++;
 197             continue;
 198         }
 199         ac = parse(cp, player->argp, NULL, scanspace, NULL);
 200         if (ac <= 1) {
 201             sprintf(dp, "%d", leader->uid);
 202             player->argp[1] = dp;
 203             cp++;
 204         } else
 205             cp = NULL;
 206         bmap_flag = 0;
 207         switch (*player->argp[0]) {
 208         case 'B':
 209             bmap_flag = 'b';
 210             /*
 211              * fall through
 212              */
 213         case 'M':
 214             do_map(bmap_flag, leader->ef_type, player->argp[1],
 215                 player->argp[2]);
 216             skip = 1;
 217             continue;
 218         case 'f':
 219             if (ac <= 1)
 220                 switch_leader(ulist, -1);
 221             else
 222                 switch_leader(ulist, atoi(player->argp[1]));
 223             leader = get_leader(ulist);
 224             if (leader->uid != leader_uid) {
 225                 leader_uid = leader->uid;
 226                 pr_leader_change(leader);
 227             }
 228             continue;
 229         case 'i':
 230             if (type == EF_SHIP)
 231                 shp_list(ulist);
 232             else
 233                 lnd_list(ulist);
 234             continue;
 235         case 'm':
 236             if (type == EF_SHIP)
 237                 stopping |= shp_sweep(ulist, 1, 1, player->cnum);
 238             else {
 239                 lnd_sweep(ulist, 1, 1, player->cnum);
 240                 stopping |= lnd_check_mines(ulist);
 241             }
 242             continue;
 243         case 'r':
 244             radar(leader->ef_type);
 245             skip = 1;
 246             player->btused++;
 247             continue;
 248         case 'l':
 249             do_look(type);
 250             player->btused++;
 251             continue;
 252         case 's':
 253             if (leader->ef_type != EF_SHIP)
 254                 break;
 255             sona();
 256             player->btused++;
 257             skip = 1;
 258             continue;
 259         case 'd':
 260             if (ac == 2) {
 261                 player->argp[2] = player->argp[1];
 262                 sprintf(dp, "%d", leader->uid);
 263                 player->argp[1] = dp;
 264             }
 265             if (type == EF_SHIP)
 266                 mine();
 267             else
 268                 landmine();
 269             skip = 1;
 270             player->btused++;
 271             continue;
 272         case 'v':
 273             if (leader->ef_type != EF_SHIP)
 274                 break;
 275             shp_view(ulist);
 276             continue;
 277         }
 278         direrr("`%c' to stop",
 279             type == EF_SHIP ? ", `%c' to view" : NULL, NULL);
 280         pr(", `i' to list %s, `f' to change %s,\n",
 281             type == EF_SHIP ? "ships" : "units",
 282             type == EF_SHIP ? "flagship" : "leader");
 283         pr("`r' to radar, %s`l' to look, `M' to map, `B' to bmap,\n",
 284             type == EF_SHIP ? "`s' to sonar, " : "");
 285         pr("`d' to drop mines, and `m' to minesweep\n");
 286         stopping = 1;
 287     }
 288     if (type == EF_SHIP && strlen(pathtaken) > 1) {
 289         pathtaken[strlen(pathtaken) - 1] = '\0';
 290         pr("Path taken: %s\n", pathtaken);
 291     }
 292     return RET_OK;
 293 }
 294
 295 int
 296 nav_map(int x, int y, int show_designations)
 297 {
 298     char *ptr;
 299     struct nstr_sect ns;
 300     struct natstr *np;
 301     struct sctstr sect;
 302     struct range range;
 303     int i;
 304     /* Note this is not re-entrant anyway, so we keep the buffers
 305        around */
 306     static unsigned char *bitmap = NULL;
 307     static char *wmapbuf = NULL;
 308     static char **wmap = NULL;
 309     int changed = 0;
 310
 311     if (!wmapbuf)
 312         wmapbuf = malloc(WORLD_Y * MAPWIDTH(1));
 313     if (!wmap) {
 314         wmap = malloc(WORLD_Y * sizeof(*wmap));
 315         if (wmap && wmapbuf) {
 316             for (i = 0; i < WORLD_Y; i++)
 317                 wmap[i] = &wmapbuf[MAPWIDTH(1) * i];
 318         } else if (wmap) {
 319             free(wmap);
 320             wmap = NULL;
 321         }
 322     }
 323     if (!bitmap)
 324         bitmap = malloc((WORLD_X * WORLD_Y) / 8);
 325     if (!wmapbuf || !wmap || !bitmap) {
 326         pr("Memory error, tell the deity.\n");
 327         logerror("malloc failed in navi\n");
 328         return RET_FAIL;
 329     }
 330     memset(bitmap, 0, (WORLD_X * WORLD_Y) / 8);
 331     snxtsct_dist(&ns, x, y, 1);
 332     np = getnatp(player->cnum);
 333     xyrelrange(np, &ns.range, &range);
 334     blankfill(wmapbuf, &ns.range, 1);
 335     while (nxtsct(&ns, &sect)) {
 336         ptr = &wmap[ns.dy][ns.dx];
 337         *ptr = dchr[sect.sct_type].d_mnem;
 338         if (!show_designations &&
 339             sect.sct_own != player->cnum &&
 340             sect.sct_type != SCT_WATER &&
 341             sect.sct_type != SCT_BSPAN && sect.sct_type != SCT_HARBR)
 342             *ptr = '?';
 343         changed += map_set(player->cnum, sect.sct_x, sect.sct_y, *ptr, 0);
 344         /*
 345          * We do it this way so that 'x' and 'X'
 346          * bdesignations will show up. This can
 347          * be used to mark mined sectors. So, the
 348          * player will see the current des, UNLESS
 349          * they've marked the sector 'x' or 'X',
 350          * in which case they'll see that.
 351          * --ts
 352          */
 353         *ptr = player->bmap[sctoff(sect.sct_x, sect.sct_y)];
 354     }
 355     if (changed)
 356         writemap(player->cnum);
 357     for (i = 0; i < ns.range.height; i++)
 358         pr("%s\n", wmap[i]);
 359     return RET_OK;
 360 }
 361
 362 static void
 363 pr_leader_change(struct empobj *leader)
 364 {
 365     pr("Changing %s to %s\n",
 366         leader->ef_type == EF_SHIP ? "flagship" : "leader",
 367         obj_nameof(leader));
 368 }
 369
 370 static struct empobj *
 371 get_leader(struct emp_qelem *list)
 372 {
 373     return &((struct ulist *)(list->q_back))->unit.gen;
 374 }
 375
 376 static void
 377 switch_leader(struct emp_qelem *list, int uid)
 378 {
 379     struct emp_qelem *qp, *save;
 380     struct ulist *ulp;
 381
 382     if (QEMPTY(list))
 383         return;
 384
 385     save = qp = list->q_back;
 386     do {
 387         emp_remque(qp);
 388         emp_insque(qp, list);
 389         qp = list->q_back;
 390         ulp = (struct ulist *)qp;
 391         if (ulp->unit.gen.uid == uid || uid == -1)
 392             break;
 393     } while (list->q_back != save);
 394 }